In this study, comparative combustion was performed in a 3-ton flue tube boiler for emulsified oil manufactured by using 15% water and approximately 1% carbide aqueous solution as an emulsifier in Bunker-C oil, and the characteristics of exhaust emissions were analyzed. As a result of performing comparative combustion under the same ambient environment and external conditions, the exhaust gas temperature decreased by approximately 3.93% from 183.76℃ for bunker-C to 176.52℃ for EM15, and the oxygen concentration increased by approximately 2.96% from 9.72% to 12.68% . Carbon dioxide decreased by approximately 2.3% from 8.49% for bunker-C to 6.19% for EM15, indicating that EM15 has a greenhouse gas reduction effect. When the standard oxygen concentration of 4% was applied, nitrogen oxides decreased by approximately 43.17% from 130.59 ppm for Bunker-C to 74.21 ppm for EM15, and sulfur oxides decreased by approximately 53.05% , confirming the excellent emission reduction characteristics of emulsified fuel oil. Therefore, it is expected that replacing emulsified fuel oil in boilers using Bunker-C oil will enable response to increasingly strengthened emission regulations.

Abstract
1. 서 론
2. 연구 방법
    2.1 Bunker-C유 정의
    2.2 유화연료유(Emulsified oil) 정의 및 제조
    2.3 연소 시험 장치
    2.4 측정 방법
3. 연구 결과
    3.1 Bunker-C유와 EM15의 배기 배출물 특성
    3.2 표준산소농도계수 4% 기준 적용
4. 결론 및 고찰
References

• 이태호(Assistant Professor, Dept. of Fisheries Education, Pukyong National University.) | Tae Ho Lee Corresponding author